console.log(`1: ${{ a: 1 }.toString()}`); // 1: [object Object]
console.log(`2: ${[1, 3, 5].toString()}`); // 2: 1,3,5
const foo = () => 123;
console.log(`3: ${foo.toString()}`); // 3: () => 123
console.log(`4: ${new Date(2020, 0, 1).toString()}`); // 4: Wed Jan 01 2020 00:00:00 GMT+0800 (中国标准时间)
